AMDZone has a news post that gives some details from an anonymous source about future chips of AMD.
Thoroughbred-initial release at 1800+ to 2200+
Barton-released only if demand is there.
SOI-gain in MHz of 10-15%
Athlon-demand dictates product life
Clawhammer-release and availability in October
Hammer chipsets-AMD will be sole manufacturer for some time after release
Clawhammer pricing-similar to Athlon pricing
Athlon/Duron SMP-non MP versions SMP capability to be removed
Hammer performance-P4 has no chance to come close in 32bit